If you've never heard of Snapchat, god! You guys are so behind the times! This app is like MMS and Mission Impossible all in one! Except it's not Mission Impossible because that's an old person show and who cares about Tom Cruise anymore? No time for watching movies when we're busy sending self-destructing pictures to each other. Set a timer on a message and, once it runs out, the recipient can no longer see your photo.